#ifndef _PARSE_PARSE_H_
#define _PARSE_PARSE_H_

#include <ivy/asm/lex.h>
#include <blue/core/queue.h>

#define __TOK_PARSER_INDEX(x) ((x)-__IVY_ASM_TOK_INDEX_BASE)
#define __SYM_PARSER_INDEX(x) ((x)-__IVY_ASM_SYM_INDEX_BASE)
#define __KW_PARSER_INDEX(x) ((x)-__IVY_ASM_KW_INDEX_BASE)

#define __TOK_PARSER_FALLBACK_INDEX IVY_ASM_TOK_NONE
#define __SYM_PARSER_FALLBACK_INDEX IVY_ASM_SYM_NONE
#define __KW_PARSER_FALLBACK_INDEX IVY_ASM_KW_NONE

#define TOK_PARSER(id, func) [__TOK_PARSER_INDEX(IVY_ASM_TOK_##id)] = func
#define SYM_PARSER(id, func) [__SYM_PARSER_INDEX(IVY_ASM_SYM_##id)] = func
#define KW_PARSER(id, func) [__KW_PARSER_INDEX(IVY_ASM_KW_##id)] = func

#define TOK_PARSER_FALLBACK(func) [__TOK_PARSER_FALLBACK_INDEX] = func
#define SYM_PARSER_FALLBACK(func) [__SYM_PARSER_FALLBACK_INDEX] = func
#define KW_PARSER_FALLBACK(func) [__KW_PARSER_FALLBACK_INDEX] = func

struct ivy_asm_parser;

enum parser_state_type_id {
	ASM_PARSER_NONE = 0,
	ASM_PARSER_UNIT,
	ASM_PARSER_CLASS,
	ASM_PARSER_CONSTPOOL,
	ASM_PARSER_IMPORT,
        ASM_PARSER_BLOCK,
	ASM_PARSER_SELECTOR,
	ASM_PARSER_IDENT,
	ASM_PARSER_ATOM,
};

typedef enum ivy_status (*token_parse_function)(
	struct ivy_asm_parser *, struct ivy_asm_token *);

struct parser_state_type {
	size_t n_state_size;

	void (*n_init_state)(struct ivy_asm_parser *, struct parser_state *);
	void (*n_finish_state)(struct ivy_asm_parser *, struct parser_state *);
        enum ivy_status (*n_add_child)(
		struct parser_state *, struct ivy_ast_node *);

        token_parse_function n_token_parsers[__TOK_PARSER_INDEX(__IVY_ASM_TOK_INDEX_LIMIT)];
        token_parse_function n_keyword_parsers[__KW_PARSER_INDEX(__IVY_ASM_KW_INDEX_LIMIT)];
        token_parse_function n_symbol_parsers[__SYM_PARSER_INDEX(__IVY_ASM_SYM_INDEX_LIMIT)];
};

struct parser_state {
	b_queue_entry s_entry;
	const struct parser_state_type *s_type;
	void *s_previous_value;
};

struct ivy_asm_parser {
	struct ivy_assembler *p_assembler;
	b_queue p_state;
};

extern struct parser_state *asm_parser_push_state(struct ivy_asm_parser *parser, enum parser_state_type_id type);
extern void asm_parser_pop_state(struct ivy_asm_parser *parser, void *ret);
extern struct parser_state *asm_parser_get_state(struct ivy_asm_parser *parser);

#endif